News, tutorials, and insights from the LocalStack team on cloud emulation, product showcases, and local development practices.https://blog.localstack.cloud/https://blog.localstack.cloud/build-and-test-aws-lambda-extensions-locally-with-localstack/https://blog.localstack.cloud/build-and-test-aws-lambda-extensions-locally-with-localstack/Learn how to build a custom AWS Lambda extension using the Extensions API. This tutorial walks through creating an audit-log extension that tracks every invocation and writes a report to S3, deployed and tested locally on LocalStack.Thu, 04 Jun 2026 00:00:00 GMT